Riet works as study coordinator at the Leiden Institute of Advanced Computer Science (LIACS). She is responsible for the BSc programme Computer Science, Computer Science & Biology and the MSc Computer Science. Riet is also the official secretary of the Board of Examiners (Board of Examiners represent the BSc programmes Computer Science, Computer Science & Biology, Computer Science & Economics and the MSc programmes Computer Science, Media Technology and ICT in Business)